Electric heater



June 24, 1930.- B. BOGNAR ELECTRIC HEATER Filed Feb 16, 1,926

' INVENTOR 6 43 Patented June 24, 1930 UNITED STATES BELA BOGNAR, or new YORK, N. Y.

ELECTRIC- HEATER Application filed February 16, 1926. Serial Ito. 88,596;

The present invention relates to improve ments in electric heaters of the type commonly employed in practicing the art of permanent hair-waving.

The main object of the invention is to so construct the heater that convenient access can be had to the heating element for repair and other purposes.

Another object of the invention is to so construct the heater that the hair carrying core is effectively held against accidental disengagement from the sleeve of the heater.

A further object of the invention is to produce a heater of the type mentioned which is simple in construction, efficient in operation, durable in use and capable of manufacture on a commercial scale, or in other words one which is not so difiicult to make as to be beyond the reasonable cost of such a contrivance.

With these and other objects in view, which will more fully appear as the nature of the invention is better understood, the same consists in the combination, arrangement and construction of parts hereinafter described, pointed out in the appended claims and illustrated in the accompanying drawings, it being understood that many changes may be made in the size and proportion of the several parts and details of construction within the scope of the appended claims, without departing from the spirit or sacrificing any of the advantages of the invention.

One of the many possible embodiments of the invention is illustrated in the accompanying drawings, in which Figure 1 is an elevation, partly in section, of a heater constructed in accordance with the present invention; and Fig. 2 is an elevation of the core locking means.

In the drawings, the numeral 10 indicates an electric plug for connecting the heater to a suitable source of electric energy, wires 11 leading to the heating elements hereinafter to be described, the arrangement being such that two heaters are connected in series to a plug, although this is not essential.

The heater comprises a cylindrical metallic shell 12, mounted upon a heat insulating handle 13. Over this shell is fitted a casing 14, held 'in'place on the shell by a set-screw 15, which extends also through a ring 16, said ring spacing'theupper end of the casing from the shell. In this manner a closed compartment, denoted by the numeral 17, is formed between the casing and shell, and into this compartment is inserted the heating element. The heating element includes an electric resistance coil 18, wound upon a layer of insulating'material 19 of asbestos or mica, or other suitable material. This layer surrounds the shell 12, as clearly shown in Fig. l of the drawings. The terminals of the resistance coil extend through but are insulated from the ring 16, and are con nected by the wires 11 above referred to to the plug 10. The hair to be curled or waved is wound around a core element 20, the said core with the hair being inserted into the sleeve 12. I

Below the handle 13 there is held within the sleeve a core locking member 21, preferably made of sheet metal. This member is in the form of a cylindrical body, having a longitudinal slot 22, it being provided at its upper end with substantially triangular prongs 23, the said prongs being bent toward the longitudinal center line of the said body for engagement with the core 20. The looking member 20, before its insertion into the shell 12, has an outer diameter which is greater than the inner diameter of the said shell, so that, when the locking member is initially compressed and insertedinto the shell, it expands after it is released and is thus heldeffectively, by friction, within the shell. The prongs of the body are disposed normally at a distance around the longitudinal center line of the locking'member which is smaller than the diameter of the core, so that the core must be forcibly projected through the locking member, the prongs gripping the core and thus safely holding the same in position within the shell.

If the heating element is to be looked after, the set-screw 15 is unscrewed until it is disengaged from the ring 16, so that the latter may be removed from the device.

After this, the casing 14 is disengaged from the shell, laying the heating element open for repair, etc.

What I claim is 1. An electric heater comprising a cylindrical shell, a cylindrical locking member in said shell held by friction therein. and provided with, a plurality of resilient prongs extending toward the longitudinal center line of said shell, and a core adapted to be inserted into said shellinto engagement with said prongs.

2. An electric heater, comprising a cylindrical shell, a cylindrical locking member in said shell provided with a longitudinal slot, said locking member: being expansible and heldw-ithin said shell by friction, a plurality of resilient prongs. on said locking member extending toward'the longitudinal center. line of saidshell, and a; core adapted to be inserted into said shell into engagement with said prongs.

3. In hair waving apparatus, a curler rod on which the hair is Wound, a tube in which said rod with the wound. hair is. inserted, means disposed within said tube for. engaging said rod with sliding frictional contact when it is inserted therein and holding itv within the tube in operative position.

4. In hair waving apparatus, a curler rod on which the hair is Wound, a tube in which said rod with the wound hair is inserted,

spring clamping means disposed Within said:

tube for engaging said rod with. spring tension and holding said rod. when. placed within the tube.

5. In apparatusfor waving hair, a curler rod on which the hair is wound, a tube in which said rod with the wound; hair. is.

placed, a set of spring clamping jaws arranged Within the tube and between which. said rod is entered when inserted Within the tube for, yieldingly engaging and holding said rod and permitting easy endwise dis engagement of said rod.

6. In apparatus for waving hair, a. tubular member, a curler-rod on. which the hair is wound for insertion in said member, means for frietionally engaging said curlerrod and said means being adapted to be inserted in said tubular-member and to triotionally engage under tension the interior- Wallsthereof.

Signed at New York, in the county of New York, and State of New York, this; 10th day-of February, A. D. 1926.

- BELA BOGNAR. 

